UV Index
UV Index
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Today's UV index in Ulan Bator, Mongolia 
will be up to 5.5, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 5.5 in Ulan Bator, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
Ulan Bator, Mongolia has one of the highest UV indexes in the world. In summer, the index can reach extreme levels, posing a risk for eye and skin damage.
The city experiences four distinct seasons. Winters are long, cold, and dry, with temperatures dropping as low as -40°C. Spring is short and windy, followed by a warm and sunny summer with occasional showers. Autumn is crisp and cool, with temperatures dropping quickly as winter approaches.
Compared to its region and neighboring countries, Ulan Bator's climate is extreme. The city is the coldest capital in the world, colder than Moscow, Helsinki, or Ottawa. Its summer temperatures, however, are similar to those in neighboring countries such as China and Russia. The city's high altitude and inland location contribute to its extreme climate.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Ulan Bator. It's designed to provide you with a better understanding of the yearly weather and sun exposure.